[Bug fortran/114922] fsyntax-only need the modules

["axel.ehrich@tu-clausthal.de" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114922

--- Comment #3 from Axel Ehrich <axel.ehrich@tu-clausthal.de> ---
The question is related to the actual purpose of the option -fsyntax only:

In my understanding, the intention of the option -fsyntax-only is to construct
the module files needed to compile the code. A  build process would involve two
steps: Step 1: construct all module files with gfortran -fsyntax only. Step 2:
construct the object files without this option, while relying on the presence
of all module files. (I have found this recipe on the internet and consider it
valuable.)

Alternatively, the purpose of -fsyntax-only could be to save compile time by a
doing quick first check before entering the time consuming parts of the
compilation.  If this syntax check goes so far that it requires the module
files already, the goal mentioned above cannot be reached.